ImageMagick: Heap Buffer Over-Write in MIFF encoder when using LZMA compression
CVE-2026-46521

5.5MEDIUM

Key Information:

Vendor

Imagemagick
Status
Imagemagick
Vendor
CVE Published:
10 June 2026

What is CVE-2026-46521?

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-48 and 7.1.2-23, when using LZMA compression in the MIFF encoder an out of bounds write can occur due to a missing check. This issue has been patched in versions 6.9.13-48 and 7.1.2-23.

Affected Version(s)

ImageMagick < 6.9.13-48 < 6.9.13-48

ImageMagick < 7.1.2-23 < 7.1.2-23

References

https://github.com/ImageMagick/ImageMagick/security/advis...
x_refsource_CONFIRM

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.